package com.yupi.yupicturebackend.aop;

import com.yupi.yupicturebackend.annotation.AuthCheck;
import com.yupi.yupicturebackend.exception.BusinessException;
import com.yupi.yupicturebackend.exception.ErrorCode;
import com.yupi.yupicturebackend.model.entity.User;
import com.yupi.yupicturebackend.model.enums.UserRoleEnum;
import com.yupi.yupicturebackend.service.UserService;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;

@Aspect
@Component
public class AuthIntercptor {

    @Resource
    private UserService userService;

    // 执行拦截
    @Around("@annotation(authCheck)")
    public Object doInterceptor(ProceedingJoinPoint joinPoint , AuthCheck authCheck) throws Throwable {
        String mustRole = authCheck.mustRole();
        RequestAttributes requestAttributes= RequestContextHolder.currentRequestAttributes();
        HttpServletRequest request = ((ServletRequestAttributes)requestAttributes).getRequest();

        // 获取当前登录用户
        User loginUser=userService.getLoginUser(request);
        UserRoleEnum mustRoleEnum = UserRoleEnum.getEnumByValue(mustRole);
        //如果不需要权限，放行
        if (mustRoleEnum==null){
            return  joinPoint.proceed();
        }
        //必须有权限才能通过
        UserRoleEnum userRoleEnum = UserRoleEnum.getEnumByValue(loginUser.getUserRole());
        if(userRoleEnum==null){
            throw new BusinessException(ErrorCode.NO_AUTH_ERROR);
        }

        //要求必须有管理员权限 ，但用户没有权限，拒绝
        if(UserRoleEnum.ADMIN.equals(mustRoleEnum)&& !UserRoleEnum.ADMIN.equals(userRoleEnum)){
            throw new BusinessException(ErrorCode.NO_AUTH_ERROR);
        }

        // 放行
        return  joinPoint.proceed();

    }



}

